Improvement in paper-bag machines



'ISheets-Sheetl. O; W. STOW.

PAPER BAG MACHINE. 91 ,178,344. Patented June 6,1876.

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7 Sheets-Sheet 2.

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PAPER BAG MACHINE. No.178,344. Patented June 6,1876.

l am? N. PETERS. PHOTO-LITHOGRAPNER, WASHINGTON D C.

7Sheets-Sheet3. 0. W- STOW. PAPER BAG MACHINE. No.178,344. Patented June6,1876.

NJETERS. PHOTO-LITHOGRAPHER, WASHINGTON. D C

0. W. STOW.

PAPER BAG MACHINE.

Patented. June 6,1876;

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0. W. STOW.

PAPER BAG MACHINE. No.178.344. Patented June 6,1876.

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PAPE G MACHINE.

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No.178,344.- entedi'u ne 6,1876.

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o. w. 'sTow. PAPER BAG MACHINE. No.178,344. Patented June 6, 18 76.-

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NVPETERS. PNOTO-LITMOGRAFNER, WASHINGTON, D 04 UNITED STATES PATENTOrrroa ORSON W. STOW, OF SOUTHINGTON, CONNECTICUT.

IMPROVEMENT IN PAPER-BAG MACHINES.

Specification forming part of Letters Patent No. 178,344, dated June 6,1876; application filed September 21, 1875.

' To all whom it may concern:

Be it known that I, 0. W. STOW, of Southington, in the county ofHartford and State of Connecticut, have invented a new Paper-BagMachine, and I do hereby declare the followverse section on line 3 3Figs. 7, 8, detached views; Figs. 9,10, diagrams.

This invention relates to an improvement in machines for the manufactureof that class of paper bags which are made by doubling the twoedges of ablank, one onto the other, and securing together, and one end closed bydoubling that end back and pasting it onto the body; and the inventionconsists in the combination of mechanism, as fully hereinafi terspecified, whereby the blank is cut from the strip into the requiredform, folded, pasted, the bottom closed, and the bag discharged completefrom the machine.

Before proceeding to the description of the machine, I will describegenerally the method of forming the bag, as illustrated in the diagram,Fig. 10.

The blank is cut in the shape there shown, which is that of aparallelogram, with a projection, y, at one end, and 2 at the other, theextreme length of this projection being the width of the bag to beproduced, and the part at each side of these projections a little.

more than one-halt the width of the central portion. These sides arefolded over onto the center, the edge of one side overlapping that apiece from each edge of the strip, as at z, Fig. 10, twice the width ofthe projecting ends, and extending into the strip the width of theoverlapping sides, and a single cut from the center of one notch to thecenter of the other,

so that forming a projecting end ofone blank forms at the same time theopposite projecting end of the other blank.

I will now proceed to the description of the machine. A is the bed'ofthe machine, supported upon a suitable frame-work; B and B the first 'orprincipal feed-rolls, geared together, as infast to the shaft B, is anarm or head, (3 carrying one or more pawls, a, engaging with the teethof the ratchet 0 so that in one direction the rotation of the ratchetengages the roll, and imparts a corresponding revolution to the roll,and returning the ratchet leaves the roll free. The extent of therotation of the roll corresponds to the length of the blank for the bagto be produced, and is made adjustable by a slot in the segmental gear 0to give a greater or less throw to the segment, and,.consequently, agreater or less extent of revolution to the roll. Forward of theprincipal rolls B B are two similar auxiliary rolls, B B. These aregeared together like the first or principal rolls, and to the first byan intermediate gear, B, as seen in Fig. 4, so that the extent ofrotation of the two pairs of rolls is the same. Paper of the requiredwidth is introduced between the principal rolls, and passed to theauxiliary rolls, and so that the paper will run and lie flat upon thebed between the two pairs of rolls. Between these two pairs of rolls thefirst cut to form the blank is made, and this is done by a cutter, d,formed upon, or attached to, an arm, D. This arm is attached to a shaft,D by the side of the machine at right angles to the rolls,

and supported in bearings D length of the blank.

.the fold or double for the bottom.

An oscillating movement is imparted to this shaft by means of aface-cam, D through a slide, D, and a connecting-rod, D so that at eachrevolution of the shaft a full oscillation is imparted to the cutter-armD, which passes down, and, in

connection with a stationary cutter, d, in the bed, cuts the paper onthe line 10 in the diagram, Fig. 9. This cut is the central orseparating out across the projecting ends. On the opposite side of themachine is a shaft, D similar to the shaft D and forward ofthe auxiliaryrolls on each of these shafts is an arm, D The shaft D is actuated fromcam D on the driving-shaft in the same manner as described for the othershaft, D and so that the two shafts operate together. -The two arms Dare provided with cutters to cut in the form shown inthe diagram, Fig.-9, at w m-that is, they cut the piece z from each side ofthe blank. Thedistance between the center of these two last cuts and the first is theThe table beneath the cutter-arms D is provided with correspondingcutters, and with an openingthrough the table, so as to entirelyseparate the piece cut and pass out below, as indicated in Fig. 5.

The cutter-arm D is made adjustable on its shaft to a greater or lessdistance from the cutter-arms D so as to vary the size of the bag, thecutter in the table being adjusted accordingly. The feed or revolutionof the rolls occurs between the operation of the cutters, and the extentof the feed corresponds to the distance between the two, so that at eachfull revolution of the feed and operation of the cutters fa.completely-cut blank isdelivered forward of the cutter-arms D".

Forward of the auxiliary rolls is a transverse bar, E, supporting atongue or thin plate, E. (Indicated in 1', and in solid black, Fig. 4.)This plate E is of the width of the bag to be produced, and lies nearthe table, but so as to allow the paper to pass be- .neath it, asindicated in Fig. 7, the solid black 0 denoting the paper. The forwardend of the plate E, which is at right angles to the sides, is in suchrelative position to the cutter-arms D that when the blank is finallyseparated by those cutters the forward end of the blank will extendbeyond the plate E sufficient to make Under this plate E the blank isleft after its final separation from the principal strip, the sides ofthe blank projecting each side from the plate E.

Close to each edge of the plate E, but below and parallel with it, afolder, F, is hinged, which allows the blank to pass freely over them,as indicated in Fig. 6; then, after the final separation of the blankfrom the strip, the folders are turned up, carrying with them the twosides of the paper over and down and onto the plate E, the edge of oneside overlapping the edge of the other, the time of one folder being alittle in advance of the other, so that one side is laid before theother comes onto it. These folders are thus actuated by the cutter.

grooved cams F on the driving-shaft through levers F and arms F the saidarms formed with an incline,f, on their under side, to work up and overthe stationary projection f on the bed, as indicated in Fig. 6.

One edge of the strip of paper from which the blanks are cut .is coatedwith paste from a hopper, G, the hopper being constructed in the usualmanner to deliver the requisite amount of paste onto the edge. If thisdelivery of the paste be continuous, the pieces subsequently cut fromthat edge would adhere to To prevent this the pasting apparatus israised from the paper at the point where that cut is t0 be subsequentlymade, and it is thus raised by means of a lever, 'G, actuated by a cam,g, on the driving-shaft, the said pasting apparatus being connected toone arm of the lever, so that as the cam 9 comes in contact with theother arm of the lever it will raise the pasting apparatus, and thisoccurs at that point in the paper where the subsequent piece is to becut, and the time corresponds to the width of the piece cut.

The next operation is to fold the projecting forward end over onto thebag, so as to close that end. For this purpose a transversepaste-hopper, H, is hung upon arms H pivoted to the bed at 70 thishopper being at least as long as the width of the bag.

From the arms H a connecting-rod, H extends downward, and is connectedto one arm of a lever, H This lever is hung upon a fulcrum, M, and theother arm extends back to the driving-shaft, where it is operated uponby a cam, H This cam serves to raise and lower the hopper at therequired time-that is, the hopper falls after the projecting end of theblank has passed beyond the plate, as seen in Fig. 7, and, after thepaste is properly applied, the hopper rises, as denoted in brokenlines,Fig. 7.

At the mouth of the hopper is a lip, h, which bears upon the paper onthe line where the fold is to be made to close the bottom. In the mouthof the hopper is a roll, I. (Denoted in solid black, Fig. 7, and in sideview, Fig. 8.) This roll nearly fills the mouth of the hopper, and so aspractically to prevent the paste from flowing from the hopper. On theouter end of this roll is a ratchet-wheel, I, and fixed to the bed is apawl, 'i, so that as the hopper descends the ratchet will strike thepawl and cause a partial rotation of the roll within the hopper.

The surface of the roll is coated by the and turn it up over the lip h,against the pasting-roll, as seen in broken lines, Fig. 7, to be coatedwith paste by contact with the surface of the roll. This defines theline of fold for the bottom, the hopper rises, and the folder fallsback, leaving the paper coated with paste and partially folded.

Beneath the plate E, and below the surface of the table, is a feed-roll,N, hung in an arm, N and caused to revolve with considerable rapidityfrom a pulley, N on the drivingshaft. (See Fig. 4.) This feed-roll NWorks through a groove in the bed; The opposite end of the arm N ishinged at the rear, as at n; intermediately it bears upon a cam, N onthe driving-shaft. This cam is constructed, as shown, so that while theblank is being fed into the machine beneath the plate E, the sidesfolded, and the end pasted, it lies below the surface of the bed; but sosoon as the end is pasted, as before described, then the rise of thecam, as shown in Fig. 4, raises the roll, so as to bear upon the underfold or side of the partially-completed bag, and by its friction forcethe bag forward longitudinally from the plate E toward rolls P P Theserolls are driven rapidly from a pulley, P beneath, or one may be drivenfrom the other.

The partially-folded end, as it enters be- I tween the rolls, is turneddown and pressed upon the surface of the bag. These rolls then draw thebag forward, pressing the pasted surfaces, and throw it complete fromthe inachine.

To prevent the too strong adhesion of the paper to the pasting-r0111,several springs, R, preferably formed of wire, are arranged in thehopper to extend down, around, and lie in grooves in the hopper, asshown in Figs. 7 and 8. At rest, however, they project somewhat from thesurface of the roll; but when the paper is pressed against the roll theyfall back into the grooves of the roll, and so soon as the folder fallsback, after having pressed the paper against the roll, these springsroact, and press the paper away from the roll.

In arranging the cutters to form the cuts,

as before described, it is preferred that the center cut be made beforethe edges or wastes are out; but this is not essential, as the order.

of cutting may be reversed.

The form of the cut is so as to make a notched or saw-tooth cut, suchout being more positively made than a straight out, as well as affordinga better condition of the paper for sticking the bottom fold.

. I claim- 1. In a machine for making paper bags,the combination of thecenter cutter and two side or waste cutters, the said center cutterarranged distinct from the side cutters, the length of the blank to becut, and so that the blank is completely formed and separated from thestrip of paper before the folding commences, substantially as described.

2. In a machine for making paper bags, the combination of the center andtwo side or waste cutters, arranged relatively to each other asdescribed, with the edge-pastin g device arranged and operating to skipthe surface of the side out or waste, substantially as set forth. 4

3. In a machine for making paper bags, the.

combination of the center cutter d and two side or waste cutters, D",each cutting or separating a piece from the blank, the principal andauxiliary feeding-rolls, with the stationary plate E, upon which theblank is folded complete, substantially as specified.

4. The combination of the feed-rolls B E the plate E above the bed A,the feed-roll N, hung in a lever, N and cam N to intermittentlypresentthe said roll N upon the under side of the plate E, to aid indrawing in the blank and discharging the bag, substantially asdescribed.

5. In a hopper for supplying paste, an annularly-grooved roll, combinedwith springs resting in said grooves, substantially as and for thepurpose specified.

O. W. STOW.

Witnesses E. B. HoLooMB, Geo. F. NEWBERRY.

